^ 2.02.1Hughes Oliphant Old. The Reading and Preaching of the Scriptures in the Worship of the Christian Church, Volume 7: Our Own Time. Wm. B. Eerdmans Publishing. 2010: 212–213. ISBN 0-8028-1771-8.
^ 3.03.13.23.3Gerald H. Anderson. Ibiam, (Francis) Akanu. Biographical Dictionary of Christian Missions. W. B. Eerdmans Publishing Company. 1998 [2010-05-27]. (原始内容存档于2017-09-08).
^Ntieyong Udo Akpan. The Struggle For Secession, 1966–1970: A Personal Account of the Nigerian Civil War. Taylor & Francis. 1976: 12. ISBN 0-7146-2949-9.